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Linear compressor

a compressor and linear technology, applied in the direction of positive displacement liquid engines, piston pumps, machines/engines, etc., can solve the problems of poor efficiency, large number of moving parts associated with pistons and crankshafts, and affecting the performance of refrigerator appliances

Active Publication Date: 2014-03-13
HAIER US APPLIANCE SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a linear compressor that includes a casing, a piston, a driving coil, and an electro-magnetic spring. The electro-magnetic spring includes a ferromagnetic tooth that urges the piston towards a default position when it is positioned away from the default position. The driving coil selectively urges the piston to slide along the axial direction from the default position. The linear compressor can operate at a resonant condition and has improved efficiency.

Problems solved by technology

However, the large number of moving parts associated with the piston and crankshaft can generate relatively large friction forces.
Such friction can result in poor efficiency and negatively affect performance of the refrigerator appliance.
Such control can be complex, expensive, and inefficient.
However, using such mechanical springs can be inefficient because such mechanical springs have fixed spring constants.

Method used

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Embodiment Construction

[0023]Reference now will be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.

[0024]FIG. 1 depicts a refrigerator appliance 10 that incorporates a sealed refrigeration system 60 (FIG. 2). It should be appreciated that the term “refrigerator appliance” is used in a generic sense herein to encompass any manner of refrigeration applianc...

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Abstract

A linear compressor is provided. The linear compressor includes a casing that defines a chamber and a piston slidably received within the chamber of the casing. A driving coil is configured for selectively urging the piston to slide within the chamber of the casing. An electro-magnetic spring is configured for urging the piston towards a default position when the piston is positioned away from the default position. The electro-magnetic spring can permit the linear compressor to operate at a resonant condition.

Description

FIELD OF THE INVENTION[0001]The present subject matter relates generally to linear compressors, e.g., for refrigerator appliances.BACKGROUND OF THE INVENTION[0002]Refrigerator appliances generally include a compressor. During operation of the refrigerator appliance, the compressor operates to provide compressed refrigerant. The refrigerator appliance utilizes such compressed refrigerant to cool a compartment of the appliance and food items located therein.[0003]Certain refrigerator appliances include a reciprocating compressor that compresses refrigerant by sliding a piston within a chamber. Reciprocating compressors can include a piston mounted to a crankshaft. As the crankshaft turns, the piston slides within the chamber in order to compress refrigerant. However, the large number of moving parts associated with the piston and crankshaft can generate relatively large friction forces. Such friction can result in poor efficiency and negatively affect performance of the refrigerator a...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04B35/04
CPCF04B35/045F04B39/0005H02K7/14H02K33/16
Inventor FILIPPA, MARIANO PABLOBARITO, THOMAS R.HAHN, GREGORY WILLIAMMALLAMPALLI, SRINIVAS
Owner HAIER US APPLIANCE SOLUTIONS INC
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